School of Chemistry and Biochemistry to Host Charles L. Liotta Symposium

This year marks Regents Professor Emeritus Charles Liotta’s 50th at Georgia Tech, and the celebration is on.

Grad Students and the Quest for the Origins of Life

Want to learn how life began? You can do that. Chemistry and Biochemistry graduate student Eric Parker tells how.

Seminars & Events

Prof. Anne Milasincic Andrews - The University of California, Los Angeles
Special Seminar - Monday, September 22, 2014 - 4:00pm - MoSE G011
Physical Division Seminar - Tuesday, September 23, 2014 - 4:00pm - MoSE 3201A
Prof. Nestor Carballeira - University of Puerto Rico
Special Seminar - Wednesday, September 24, 2014 - 12:00pm - MoSE 1201A
Prof. Harmit Malik - Fred Hutchinson Cancer Center
Chemical Biology - Thursday, September 25, 2014 - 11:00am - MoSE 3201A

Featured Research

Article Title
Research Authors
Matthew C. Hagy., Rigoberto Hernandez.
The Journal of Chemical Physics (2014), Vol. 140, 034701
Miscellaneous Details
National Science Foundation ; Center for Computational Molecular Science and Technology

To what extent can you control the structure and motion of an assembly of colloidal particles through a coating of its surface? This is precisely the problem that recent graduate, Dr. Matthew Hagy, and Prof. Hernandez have been studying over the past couple of years. Their colloidal particles are a couple hundred nanometers in diameter. The coating corresponds to the charges encoded on the surface of the colloids. Opposite charges attract.

In the work that was just published in the Journal of Chemical Physics, Hagy and Hernandez now consider the case in which the spheres are coated in stripes of alternating charge. This generalizes the surface pattern of the Janus particles to three, four, five, six, and more stripes. The funny thing is that very little happens to the packing of the particles because that property is so strongly dominated by the shape of the particles. But their motion, and the timescales in which they relax from a given deformation is highly sensitive to the number of stripes and perhaps also to how they are striped. In a sense, this says that if you want to maintain their behavior, you can fatten them up a little but you can't change their stripes.

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